[PATCH nft] parser_bison: explicit indication on export ruleset

[Pablo Neira Ayuso <pablo@netfilter.org>]

This patch modifies the grammar to explicitly indicate what you want to
export, eg.

 # nft export ruleset json

This leaves room to extend this later on to support other object types,
such as integrating conntrack into nft.

This also leaves the syntax in consistent state wrt. other existing
objects. The existing syntax is still preserved.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 src/parser_bison.y | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/parser_bison.y b/src/parser_bison.y
index e16b8a3..cd149e7 100644
--- a/src/parser_bison.y
+++ b/src/parser_bison.y
@@ -882,7 +882,13 @@ rename_cmd		:	CHAIN		chain_spec	identifier
 			}
 			;
 
-export_cmd		:	export_format
+export_cmd		:	RULESET		export_format
+			{
+				struct handle h = { .family = NFPROTO_UNSPEC };
+				struct export *export = export_alloc($2);
+				$$ = cmd_alloc(CMD_EXPORT, CMD_OBJ_EXPORT, &h, &@$, export);
+			}
+			|	export_format
 			{
 				struct handle h = { .family = NFPROTO_UNSPEC };
 				struct export *export = export_alloc($1);
-- 
2.1.4